Composite fabricated underground structure and reverse construction method thereof

Abstract

The invention discloses a composite fabricated underground structure. The composite fabricated underground structure comprises underground walls, steel structure clamping grooves, prestressed jacks, and main structure standing columns; prefabricated top longitudinal beams, prefabricated top plates, top plate cast-in-place layers, and top plate waterproof layers jointly form composite waterproof prestressed top plates; prefabricated middle longitudinal beams, prefabricated middle plates, and middle plate cast-in-place layers jointly form composite middle plates; prefabricated cushion layers, bottom plate waterproof layers and cast-in-place bottom plates jointly form composite waterproof bottom plates; the underground walls, side wall waterproof layers, and side wall cast-in-place layers jointly form composite waterproof walls; the composite waterproof prestressed top plates, the composite prestressed middle plates, the composite waterproof bottom plates and the composite waterproof walls are all effectively connected, and the full-package waterproof full-composite fabricated underground structure is formed; thus the problem of water leakage of the fully fabricated underground structure is solved, the limitation of the application range of the fabricated underground structure is broken, the composite fabricated underground structure can be applied to the areas with water-rich stratums, complicated surrounding environment and high deformation control, and the extensive application of the prefabricated structure in underground engineering can be effectively promoted.

Description

technical field [0001] The invention belongs to the field of underground engineering, and in particular relates to a composite assembled underground structure and a reverse construction method, and is especially suitable for a composite assembled subway station structure and its construction. Background technique [0002] Existing underground structure engineering, such as subway station structure, has two structural forms, prefabricated underground structure and full cut-and-cast underground structure, but both have their own defects. [0003] Problems with prefabricated underground structures include: [0004] (1) The prefabricated type has only one waterproof system for prefabricated components, and there are large leakage hidden dangers at the joints and joints; the waterproof level of the underground structure is the first level, no water leakage is allowed, and there is no wet stain on the surface of the structure; therefore, in water-rich areas, The application of pr...

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Problems solved by technology

[0022] Aiming at at least one of the above defects or improvement needs of the prior art, the present invention provides a composite assembled underground structure and a reverse construction method, which overcomes the problem of water leakage in the fully assembled underground structure and breaks through the prefabricated underground structure. Due to the limitation of the application range of the structure, it can be applied in areas with rich water, complex surrounding environment and high deformation control, which can effectively promote the wide application of prefabricated structures in underground engineering

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